Triangle read by rows: T(n,k) is the number of length-n ascent sequences without flat steps, containing k zeros.

A218757

Triangle read by rows: T(n,k) is the number of length-n ascent sequences without flat steps, containing k zeros.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =1a(9) =0a(10) =0a(11) =2a(12) =3a(13) =0a(14) =0a(15) =0a(16) =5a(17) =9a(18) =2a(19) =0a(20) =0a(21) =0a(22) =16a(23) =32a(24) =13a(25) =0a(26) =0a(27) =0a(28) =0a(29) =61

External references